Janna Doheny conned taxpayers out of $29,000 by claiming she made poverty wages at a Queens strip club — when she was spending millions buying up luxury apartments, authorities said yesterday.

Doheny, 43, allegedly bought five expensive Brighton Beach apartments — plus other property in Bay Ridge, Long Island and South Florida — while she claimed to Medicaid that she earned just $1,550 a month at the jiggle joint, according to the Brooklyn District Attorney’s Office.

While she claimed to be destitute when she began receiving Medicaid benefits for herself and her daughter in 2004, Doheny actually had $170,000 in cash in a Long Island safe deposit box, authorities said.